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A block of mass (m) slides along the tra...

A block of mass (m) slides along the track with kinetic friction `mu`. (A) man pulls the block through a rope which makes an angle `theta` with the horizontal as shown in the figure. The block moves with constant speed v. Power delivered by man is
.

A

Tv

B

`Tv cos theta`

C

`(T cos theta - mu mg)v`

D

zero

Text Solution

Verified by Experts

The correct Answer is:
B
Instantaneous power is given as `P=Fv cos phi`
Here, angle `phi` between tension and velocity is `theta`
So, `P= Tv cos theta`
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